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It will last almost two hours and feature a blood moon, where the moon will have a slightly red tinge.

However, not everyone is looking forward to the phenomenon and doomsdayers are preparing for Armageddon.

Christian ministers John Hagee and Mark Biltz originally made the hypothesis famous.

They said the ongoing four consecutive lunar eclipses - or "tertrad" - which began in April 2014 with six full moons in between is an indicator of the end of the Earth.

They are described in the Bible in Acts 2:20 and Revelation 6:12.

The blood moon is expected to arrive ahead of the lunar eclipse on July 27

However, the tetrad ended in September 2017 and we're all still here.

The end-of-days preachers insist some sort of tragic event is set to hit Earth and possibly wipe us all out.

The theory has been picked up by similar thinkers and the prophecy tends to resurface weeks before every blood moon.

The "blood moon" theory is interpreted from the Book of Joel, which says: "The sun will turn into darkness, and the moon into blood, before the great and terrible day of the Lord comes."

A similar passage in the Book of Revelations reads: "And I beheld when he had opened the sixth seal, and, lo, there was a great earthquake; and the sun became black as sackcloth of hair, and the moon became as blood."

But it has been routinely dismissed by astronomers and other experts as a myth.

Scientists say the red tinge is due to Rayleigh scattering of sunlight through the Earth's atmosphere.

It also causes the reddening of the sun at sunset.

Even though the myth has been debunked, YouTube is littered with videos from doomsdayers predicting the end of the world in just a few weeks' time.

Endtime Ministries' Irvin Baxter, who has made a number of failed predictions since the mid-1980s, is among those who point to passages in the Book of Joel.